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Finding the Fourth Proportional to 77,326,780.80, 115,987,546.80 and 19,819,615.80

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Solution

The fourth proportional to 77,326,780.80, 115,987,546.80 and 19,819,615.80 is: 29,728,751.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,326,780.80 : 115,987,546.80 = 19,819,615.80 : x
  2. Step 2: Convert to fraction form
    77,326,780.80/115,987,546.80 = 19,819,615.80/x
  3. Step 3: Cross multiply
    77,326,780.80x = 115,987,546.80 × 19,819,615.80
  4. Step 4: Simplify right side
    77,326,780.80x = 2,298,828,615,160,519.50
  5. Step 5: Solve for x
    x = 2,298,828,615,160,519.50/77,326,780.80
  6. Step 6: Final answer
    x = 29,728,751.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.